P2033: Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2
The P2033 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the exhaust gas temperature (EGT) sensor located after the diesel particulate filter (DPF) on Bank 1. This sensor monitors exhaust temperature to protect the DPF and other components. A high circuit condition typically means the sensor's resistance is too high, often due to a faulty sensor, wiring issues, or a short to voltage. This can lead to incorrect temperature readings, affecting DPF regeneration and potentially causing emissions system damage.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Open or shorted wiring in the sensor circuit
- Corroded or damaged connector
- ECM software or hardware issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel efficiency
- Possible limp mode or reduced engine power
- Failed emissions test
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes.
Step 2: Visually inspect the EGT sensor and wiring for damage, corrosion, or loose connections.
Step 3: Measure sensor resistance and compare to manufacturer specifications (typically 100-200k ohms at room temperature).
Step 4: Check for short to voltage or ground in the wiring harness using a multimeter.
Step 5: If all else is normal, replace the EGT sensor and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause improper DPF regeneration, leading to clogged filter and expensive repairs. Short trips may be okay, but have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, including parts and labor. The sensor itself costs $50-$150, and labor adds $100-$250 depending on vehicle and shop rates.